diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index fa589da..d834f9a 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -6,17 +6,5 @@
     <rule ref="PSR2" >
         <!-- Current exclusions -->
         <exclude name="PSR1.Methods.CamelCapsMethodName" />
-        <exclude name="PSR1.Files.SideEffects.FoundWithSymbols" />
-        <exclude name="PSR2.Classes.PropertyDeclaration" />
-        <exclude name="PSR2.ControlStructures.SwitchDeclaration" /> <!-- causes php notice while linting -->
-        <exclude name="PSR2.ControlStructures.SwitchDeclaration.WrongOpenercase" />
-        <exclude name="PSR2.ControlStructures.SwitchDeclaration.WrongOpenerdefault" />
-        <exclude name="PSR2.ControlStructures.SwitchDeclaration.TerminatingComment" />
-        <exclude name="PSR2.Methods.MethodDeclaration.Underscore" />
-        <exclude name="Squiz.Scope.MethodScope" />
-        <exclude name="Squiz.Classes.ValidClassName.NotCamelCaps" />
-        <exclude name="Generic.Files.LineLength.TooLong" />
-        <exclude name="PEAR.Functions.ValidDefaultValue.NotAtEnd" />
     </rule>
-
-</ruleset>
\ No newline at end of file
+</ruleset>
diff --git a/src/Admin/CommentAdmin.php b/src/Admin/CommentAdmin.php
index 2cb4a8e..7cbd599 100644
--- a/src/Admin/CommentAdmin.php
+++ b/src/Admin/CommentAdmin.php
@@ -3,22 +3,19 @@
 namespace SilverStripe\Comments\Admin;
 
 use SilverStripe\Admin\LeftAndMain;
-use SilverStripe\Comments\Admin\CommentsGridField;
 use SilverStripe\Comments\Model\Comment;
-use SilverStripe\Forms\Tab;
-use SilverStripe\Forms\TabSet;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\Form;
-use SilverStripe\Security\PermissionProvider;
+use SilverStripe\Forms\Tab;
+use SilverStripe\Forms\TabSet;
 use SilverStripe\Security\Security;
-use SilverStripe\View\SSViewer;
 
 /**
  * Comment administration system within the CMS
  *
  * @package comments
  */
-class CommentAdmin extends LeftAndMain implements PermissionProvider
+class CommentAdmin extends LeftAndMain
 {
     private static $url_segment = 'comments';
 
@@ -28,7 +25,7 @@ class CommentAdmin extends LeftAndMain implements PermissionProvider
 
     private static $menu_icon_class = 'font-icon-comment';
 
-    private static $allowed_actions = array(
+    private static $allowed_actions = [
         'approvedmarked',
         'deleteall',
         'deletemarked',
@@ -37,18 +34,18 @@ class CommentAdmin extends LeftAndMain implements PermissionProvider
         'spammarked',
         'EditForm',
         'unmoderated'
-    );
+    ];
 
     private static $required_permission_codes = 'CMS_ACCESS_CommentAdmin';
 
     public function providePermissions()
     {
-        return array(
-            "CMS_ACCESS_CommentAdmin" => array(
+        return [
+            'CMS_ACCESS_CommentAdmin' => [
                 'name' => _t(__CLASS__ . '.ADMIN_PERMISSION', "Access to 'Comments' section"),
                 'category' => _t('SilverStripe\\Security\\Permission.CMS_ACCESS_CATEGORY', 'CMS Access')
-            )
-        );
+            ],
+        ];
     }
 
     /**
@@ -69,7 +66,7 @@ class CommentAdmin extends LeftAndMain implements PermissionProvider
 
         $newComments = Comment::get()->filter('Moderated', 0);
 
-        $newGrid = new CommentsGridField(
+        $newGrid = CommentsGridField::create(
             'NewComments',
             '',
             $newComments,
@@ -78,7 +75,7 @@ class CommentAdmin extends LeftAndMain implements PermissionProvider
 
         $approvedComments = Comment::get()->filter('Moderated', 1)->filter('IsSpam', 0);
 
-        $approvedGrid = new CommentsGridField(
+        $approvedGrid = CommentsGridField::create(
             'ApprovedComments',
             '',
             $approvedComments,
@@ -87,7 +84,7 @@ class CommentAdmin extends LeftAndMain implements PermissionProvider
 
         $spamComments = Comment::get()->filter('Moderated', 1)->filter('IsSpam', 1);
 
-        $spamGrid = new CommentsGridField(
+        $spamGrid = CommentsGridField::create(
             'SpamComments',
             '',
             $spamComments,
@@ -136,11 +133,11 @@ class CommentAdmin extends LeftAndMain implements PermissionProvider
             $actions
         );
 
-        $form->addExtraClass('cms-edit-form');
+        $form->addExtraClass('cms-edit-form fill-height');
         $form->setTemplate($this->getTemplatesWithSuffix('_EditForm'));
 
         if ($form->Fields()->hasTabset()) {
-             $form->Fields()->findOrMakeTab('Root')->setTemplate('SilverStripe\\Forms\\CMSTabSet');
+            $form->Fields()->findOrMakeTab('Root')->setTemplate('SilverStripe\\Forms\\CMSTabSet');
             $form->addExtraClass('center ss-tabset cms-tabset ' . $this->BaseCSSClasses());
         }
 
diff --git a/src/Admin/CommentsGridField.php b/src/Admin/CommentsGridField.php
index 732c036..cde1eed 100644
--- a/src/Admin/CommentsGridField.php
+++ b/src/Admin/CommentsGridField.php
@@ -2,7 +2,6 @@
 
 namespace SilverStripe\Comments\Admin;
 
-use SilverStripe\Forms\FormField;
 use SilverStripe\Forms\GridField\GridField;
 use SilverStripe\View\HTML;
 
diff --git a/src/Admin/CommentsGridFieldAction.php b/src/Admin/CommentsGridFieldAction.php
index d602bf4..478472d 100644
--- a/src/Admin/CommentsGridFieldAction.php
+++ b/src/Admin/CommentsGridFieldAction.php
@@ -26,7 +26,7 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
      */
     public function getColumnAttributes($gridField, $record, $columnName)
     {
-        return array('class' => 'col-buttons');
+        return ['class' => 'col-buttons'];
     }
 
     /**
@@ -34,8 +34,8 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
      */
     public function getColumnMetadata($gridField, $columnName)
     {
-        if ($columnName == 'Actions') {
-            return array('title' => '');
+        if ($columnName === 'Actions') {
+            return ['title' => ''];
         }
     }
 
@@ -44,7 +44,7 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
      */
     public function getColumnsHandled($gridField)
     {
-        return array('Actions');
+        return ['Actions'];
     }
 
     /**
@@ -64,7 +64,7 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
                 'CustomAction' . $record->ID . 'Spam',
                 _t(__CLASS__ . '.SPAM', 'Spam'),
                 'spam',
-                array('RecordID' => $record->ID)
+                ['RecordID' => $record->ID]
             )
                 ->addExtraClass('btn btn-secondary grid-field__icon-action')
                 ->Field();
@@ -76,7 +76,7 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
                 'CustomAction' . $record->ID . 'Approve',
                 _t(__CLASS__ . '.APPROVE', 'Approve'),
                 'approve',
-                array('RecordID' => $record->ID)
+                ['RecordID' => $record->ID]
             )
                 ->addExtraClass('btn btn-secondary grid-field__icon-action')
                 ->Field();
@@ -90,7 +90,7 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
      */
     public function getActions($gridField)
     {
-        return array('spam', 'approve');
+        return ['spam', 'approve'];
     }
 
     /**
@@ -98,7 +98,8 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
      */
     public function handleAction(GridField $gridField, $actionName, $arguments, $data)
     {
-        if ($actionName == 'spam') {
+        if ($actionName === 'spam') {
+            /** @var Comment $comment */
             $comment = Comment::get()->byID($arguments['RecordID']);
             $comment->markSpam();
 
@@ -109,7 +110,8 @@ class CommentsGridFieldAction implements GridField_ColumnProvider, GridField_Act
             );
         }
 
-        if ($actionName == 'approve') {
+        if ($actionName === 'approve') {
+            /** @var Comment $comment */
             $comment = Comment::get()->byID($arguments['RecordID']);
             $comment->markApproved();
 
diff --git a/src/Admin/CommentsGridFieldConfig.php b/src/Admin/CommentsGridFieldConfig.php
index 4225fec..fb0c300 100644
--- a/src/Admin/CommentsGridFieldConfig.php
+++ b/src/Admin/CommentsGridFieldConfig.php
@@ -20,8 +20,9 @@ class CommentsGridFieldConfig extends GridFieldConfig_RecordEditor
         $this->addComponent(new CommentsGridFieldAction());
 
         // Format column
+        /** @var GridFieldDataColumns $columns */
         $columns = $this->getComponentByType(GridFieldDataColumns::class);
-        $columns->setFieldFormatting(array(
+        $columns->setFieldFormatting([
             'ParentTitle' => function ($value, &$item) {
                 return sprintf(
                     '<a href="%s" class="cms-panel-link external-link action" target="_blank">%s</a>',
@@ -29,10 +30,10 @@ class CommentsGridFieldConfig extends GridFieldConfig_RecordEditor
                     $item->obj('ParentTitle')->forTemplate()
                 );
             }
-        ));
+        ]);
 
         // Add bulk option
-        $manager = new BulkManager(null, false);
+        $manager = BulkManager::create(null, false);
 
         $spamAction = SpamHandler::create()->setLabel(_t(__CLASS__ . '.SPAM', 'Spam'));
         $approveAction = ApproveHandler::create()->setLabel(_t(__CLASS__ . '.APPROVE', 'Approve'));
diff --git a/src/Controllers/CommentingController.php b/src/Controllers/CommentingController.php
index f69afc7..50c5fcd 100644
--- a/src/Controllers/CommentingController.php
+++ b/src/Controllers/CommentingController.php
@@ -4,20 +4,21 @@ namespace SilverStripe\Comments\Controllers;
 
 use SilverStripe\CMS\Model\SiteTree;
 use SilverStripe\Comments\Extensions\CommentsExtension;
+use SilverStripe\Comments\Forms\CommentForm;
 use SilverStripe\Comments\Model\Comment;
-use SilverStripe\Control\Director;
 use SilverStripe\Control\Controller;
-use SilverStripe\Control\Email\Email;
+use SilverStripe\Control\Director;
 use SilverStripe\Control\HTTP;
 use SilverStripe\Control\HTTPRequest;
+use SilverStripe\Control\HTTPResponse;
+use SilverStripe\Control\HTTPResponse_Exception;
 use SilverStripe\Control\RSS\RSSFeed;
-use SilverStripe\Control\Session;
-use SilverStripe\ORM\DataObject;
-use SilverStripe\ORM\PaginatedList;
-use SilverStripe\Security\Member;
-use SilverStripe\Security\Security;
 use SilverStripe\Core\Injector\Injector;
-use SilverStripe\Comments\Forms\CommentForm;
+use SilverStripe\Forms\Form;
+use SilverStripe\ORM\DataObject;
+use SilverStripe\ORM\FieldType\DBHTMLText;
+use SilverStripe\ORM\PaginatedList;
+use SilverStripe\Security\Security;
 
 /**
  * @package comments
@@ -27,7 +28,7 @@ class CommentingController extends Controller
     /**
      * {@inheritDoc}
      */
-    private static $allowed_actions = array(
+    private static $allowed_actions = [
         'delete',
         'spam',
         'ham',
@@ -36,15 +37,15 @@ class CommentingController extends Controller
         'CommentsForm',
         'reply',
         'doPostComment',
-        'doPreviewComment'
-    );
+        'doPreviewComment',
+    ];
 
     /**
      * {@inheritDoc}
      */
-    private static $url_handlers = array(
+    private static $url_handlers = [
         'reply/$ParentCommentID//$ID/$OtherID' => 'reply',
-    );
+    ];
 
     /**
      * Fields required for this form
@@ -52,11 +53,11 @@ class CommentingController extends Controller
      * @var array
      * @config
      */
-    private static $required_fields = array(
+    private static $required_fields = [
         'Name',
         'Email',
-        'Comment'
-    );
+        'Comment',
+    ];
 
     /**
      * Parent class this commenting form is for
@@ -70,21 +71,21 @@ class CommentingController extends Controller
      *
      * @var DataObject
      */
-    private $ownerRecord = null;
+    private $ownerRecord;
 
     /**
      * Parent controller record
      *
      * @var Controller
      */
-    private $ownerController = null;
+    private $ownerController;
 
     /**
      * Backup url to return to
      *
      * @var string
      */
-    protected $fallbackReturnURL = null;
+    protected $fallbackReturnURL;
 
     /**
      * Set the parent class name to use
@@ -178,6 +179,7 @@ class CommentingController extends Controller
     {
         // If possible use the current record
         if ($record = $this->getOwnerRecord()) {
+            /** @var DataObject|CommentsExtension $record */
             return $record->getCommentsOption($key);
         }
 
@@ -198,6 +200,7 @@ class CommentingController extends Controller
     public function getOptions()
     {
         if ($record = $this->getOwnerRecord()) {
+            /** @var DataObject|CommentsExtension $record */
             return $record->getCommentsOptions();
         }
 
@@ -226,7 +229,7 @@ class CommentingController extends Controller
     /**
      * Outputs the RSS feed of comments
      *
-     * @return HTMLText
+     * @return DBHTMLText
      */
     public function rss()
     {
@@ -252,10 +255,10 @@ class CommentingController extends Controller
             $class = SiteTree::class;
         }
 
-        $comments = Comment::get()->filter(array(
+        $comments = Comment::get()->filter([
             'Moderated' => 1,
             'IsSpam' => 0,
-        ));
+        ]);
 
         // Check if class filter
         if ($class) {
@@ -275,10 +278,10 @@ class CommentingController extends Controller
         }
 
         $title = _t(__CLASS__ . '.RSSTITLE', "Comments RSS Feed");
-        $comments = new PaginatedList($comments, $request);
+        $comments = PaginatedList::create($comments, $request);
         $comments->setPageLength($this->getOption('comments_per_page'));
 
-        return new RSSFeed(
+        return RSSFeed::create(
             $comments,
             $link,
             $title,
@@ -375,6 +378,9 @@ class CommentingController extends Controller
      * Redirect back to referer if available, ensuring that only site URLs
      * are allowed to avoid phishing.  If it's an AJAX request render the
      * comment in it's new state
+     *
+     * @param Comment $comment
+     * @return DBHTMLText|HTTPResponse|false
      */
     private function renderChangedCommentState($comment)
     {
@@ -383,21 +389,21 @@ class CommentingController extends Controller
         // Render comment using AJAX
         if ($this->request->isAjax()) {
             return $comment->renderWith('Includes/CommentsInterface_singlecomment');
-        } else {
-            // Redirect to either the comment or start of the page
-            if (empty($referer)) {
-                return $this->redirectBack();
-            } else {
-                // Redirect to the comment, but check for phishing
-                $url = $referer . '#comment-' . $comment->ID;
-                // absolute redirection URLs not located on this site may cause phishing
-                if (Director::is_site_url($url)) {
-                    return $this->redirect($url);
-                } else {
-                    return false;
-                }
-            }
         }
+
+        // Redirect to either the comment or start of the page
+        if (empty($referer)) {
+            return $this->redirectBack();
+        }
+
+        // Redirect to the comment, but check for phishing
+        $url = $referer . '#comment-' . $comment->ID;
+        // absolute redirection URLs not located on this site may cause phishing
+        if (Director::is_site_url($url)) {
+            return $this->redirect($url);
+        }
+
+        return false;
     }
 
     /**
@@ -411,6 +417,7 @@ class CommentingController extends Controller
         $id = isset($this->urlParams['ID']) ? $this->urlParams['ID'] : false;
 
         if ($id) {
+            /** @var Comment $comment */
             $comment = Comment::get()->byId($id);
             if ($comment) {
                 $this->fallbackReturnURL = $comment->Link();
@@ -436,9 +443,9 @@ class CommentingController extends Controller
         $form->addExtraClass('reply-form');
 
         // Load parent into reply form
-        $form->loadDataFrom(array(
+        $form->loadDataFrom([
             'ParentCommentID' => $comment->ID
-        ));
+        ]);
 
         // Customise action
         $form->setFormAction($this->Link('reply', $comment->ID));
@@ -461,6 +468,7 @@ class CommentingController extends Controller
     {
         // Extract parent comment from reply and build this way
         if ($parentID = $request->param('ParentCommentID')) {
+            /** @var Comment $comment */
             $comment = DataObject::get_by_id(Comment::class, $parentID, true);
             if ($comment) {
                 return $this->ReplyForm($comment);
@@ -518,8 +526,8 @@ class CommentingController extends Controller
         // absolute redirection URLs not located on this site may cause phishing
         if (Director::is_site_url($url)) {
             return $this->redirect($url);
-        } else {
-            return false;
         }
+
+        return false;
     }
 }
diff --git a/src/Extensions/CommentsExtension.php b/src/Extensions/CommentsExtension.php
index ed827fb..ce0ec93 100644
--- a/src/Extensions/CommentsExtension.php
+++ b/src/Extensions/CommentsExtension.php
@@ -9,10 +9,7 @@ use SilverStripe\Comments\Controllers\CommentingController;
 use SilverStripe\Comments\Model\Comment;
 use SilverStripe\Control\Controller;
 use SilverStripe\Control\Director;
-use SilverStripe\Control\Session;
 use SilverStripe\Core\Config\Config;
-use SilverStripe\Core\Manifest\ModuleLoader;
-use SilverStripe\Dev\Deprecation;
 use SilverStripe\Forms\CheckboxField;
 use SilverStripe\Forms\DropdownField;
 use SilverStripe\Forms\FieldGroup;
@@ -20,9 +17,11 @@ use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\Tab;
 use SilverStripe\Forms\TabSet;
 use SilverStripe\ORM\DataExtension;
+use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\PaginatedList;
 use SilverStripe\Security\Member;
 use SilverStripe\Security\Permission;
+use SilverStripe\Security\Security;
 use SilverStripe\View\Requirements;
 
 /**
@@ -157,13 +156,16 @@ class CommentsExtension extends DataExtension
 
         // Check if enabled setting should be cms configurable
         if ($this->owner->getCommentsOption('enabled_cms')) {
-            $options->push(new CheckboxField('ProvideComments', _t('SilverStripe\\Comments\\Model\\Comment.ALLOWCOMMENTS', 'Allow Comments')));
+            $options->push(CheckboxField::create('ProvideComments', _t(
+                'SilverStripe\\Comments\\Model\\Comment.ALLOWCOMMENTS',
+                'Allow Comments'
+            )));
         }
 
         // Check if we should require users to login to comment
         if ($this->owner->getCommentsOption('require_login_cms')) {
             $options->push(
-                new CheckboxField(
+                CheckboxField::create(
                     'CommentsRequireLogin',
                     _t('Comments.COMMENTSREQUIRELOGIN', 'Require login to comment')
                 )
@@ -180,16 +182,23 @@ class CommentsExtension extends DataExtension
 
         // Check if moderation should be enabled via cms configurable
         if ($this->owner->getCommentsOption('require_moderation_cms')) {
-            $moderationField = new DropdownField('ModerationRequired', _t(__CLASS__ . '.COMMENTMODERATION', 'Comment Moderation'), array(
-                'None' => _t(__CLASS__ . '.MODERATIONREQUIRED_NONE', 'No moderation required'),
-                'Required' => _t(__CLASS__ . '.MODERATIONREQUIRED_REQUIRED', 'Moderate all comments'),
-                'NonMembersOnly' => _t(
-                    __CLASS__ . '.MODERATIONREQUIRED_NONMEMBERSONLY',
-                    'Only moderate non-members'
+            $moderationField = DropdownField::create(
+                'ModerationRequired',
+                _t(
+                    __CLASS__ . '.COMMENTMODERATION',
+                    'Comment Moderation'
                 ),
-            ));
+                [
+                    'None' => _t(__CLASS__ . '.MODERATIONREQUIRED_NONE', 'No moderation required'),
+                    'Required' => _t(__CLASS__ . '.MODERATIONREQUIRED_REQUIRED', 'Moderate all comments'),
+                    'NonMembersOnly' => _t(
+                        __CLASS__ . '.MODERATIONREQUIRED_NONMEMBERSONLY',
+                        'Only moderate non-members'
+                    ),
+                ]
+            );
             if ($fields->hasTabSet()) {
-                $fields->addFieldsToTab('Root.Settings', $moderationField);
+                $fields->addFieldToTab('Root.Settings', $moderationField);
             } else {
                 $fields->push($moderationField);
             }
@@ -209,13 +218,17 @@ class CommentsExtension extends DataExtension
     {
         if ($this->owner->getCommentsOption('require_moderation_cms')) {
             return $this->owner->getField('ModerationRequired');
-        } elseif ($this->owner->getCommentsOption('require_moderation')) {
-            return 'Required';
-        } elseif ($this->owner->getCommentsOption('require_moderation_nonmembers')) {
-            return 'NonMembersOnly';
-        } else {
-            return 'None';
         }
+
+        if ($this->owner->getCommentsOption('require_moderation')) {
+            return 'Required';
+        }
+
+        if ($this->owner->getCommentsOption('require_moderation_nonmembers')) {
+            return 'NonMembersOnly';
+        }
+
+        return 'None';
     }
 
     /**
@@ -227,9 +240,8 @@ class CommentsExtension extends DataExtension
     {
         if ($this->owner->getCommentsOption('require_login_cms')) {
             return (bool) $this->owner->getField('CommentsRequireLogin');
-        } else {
-            return (bool) $this->owner->getCommentsOption('require_login');
         }
+        return (bool) $this->owner->getCommentsOption('require_login');
     }
 
     /**
@@ -304,7 +316,7 @@ class CommentsExtension extends DataExtension
         $list = $this->Comments();
 
         // Add pagination
-        $list = new PaginatedList($list, Controller::curr()->getRequest());
+        $list = PaginatedList::create($list, Controller::curr()->getRequest());
         $list->setPaginationGetVar('commentsstart' . $this->owner->ID);
         $list->setPageLength($this->owner->getCommentsOption('comments_per_page'));
 
@@ -378,7 +390,7 @@ class CommentsExtension extends DataExtension
         }
 
         // Check member is logged in
-        $member = $member ?: Member::currentUser();
+        $member = $member ?: Security::getCurrentUser();
         if (!$member) {
             return false;
         }
@@ -472,10 +484,10 @@ class CommentsExtension extends DataExtension
         // return back the same variables as previously done in comments
         return $this
             ->owner
-            ->customise(array(
+            ->customise([
                 'AddCommentForm' => $form,
                 'ModeratedSubmitted' => $moderatedSubmitted,
-            ))
+            ])
             ->renderWith('CommentsInterface');
     }
 
@@ -523,8 +535,6 @@ class CommentsExtension extends DataExtension
      */
     public function getCommentsOptions()
     {
-        $settings = [];
-
         if ($this->owner) {
             $settings = $this->owner->config()->get('comments');
         } else {
@@ -545,7 +555,7 @@ class CommentsExtension extends DataExtension
 
         $newComments = $this->owner->AllComments()->filter('Moderated', 0);
 
-        $newGrid = new CommentsGridField(
+        $newGrid = CommentsGridField::create(
             'NewComments',
             _t('CommentsAdmin.NewComments', 'New'),
             $newComments,
@@ -563,7 +573,7 @@ class CommentsExtension extends DataExtension
 
         $spamComments = $this->owner->AllComments()->filter('Moderated', 1)->filter('IsSpam', 1);
 
-        $spamGrid = new CommentsGridField(
+        $spamGrid = CommentsGridField::create(
             'SpamComments',
             _t('CommentsAdmin.SpamComments', 'Spam'),
             $spamComments,
@@ -575,19 +585,19 @@ class CommentsExtension extends DataExtension
         $spamCount = '(' . count($spamComments) . ')';
 
         if ($fields->hasTabSet()) {
-            $tabs = new TabSet(
+            $tabs = TabSet::create(
                 'Comments',
-                new Tab(
+                Tab::create(
                     'CommentsNewCommentsTab',
                     _t('SilverStripe\\Comments\\Admin\\CommentAdmin.NewComments', 'New') . ' ' . $newCount,
                     $newGrid
                 ),
-                new Tab(
+                Tab::create(
                     'CommentsCommentsTab',
                     _t('SilverStripe\\Comments\\Admin\\CommentAdmin.Comments', 'Approved') . ' ' . $approvedCount,
                     $approvedGrid
                 ),
-                new Tab(
+                Tab::create(
                     'CommentsSpamCommentsTab',
                     _t('SilverStripe\\Comments\\Admin\\CommentAdmin.SpamComments', 'Spam') . ' ' . $spamCount,
                     $spamGrid
diff --git a/src/Forms/CommentForm.php b/src/Forms/CommentForm.php
index edee7de..04c1a68 100644
--- a/src/Forms/CommentForm.php
+++ b/src/Forms/CommentForm.php
@@ -2,7 +2,11 @@
 
 namespace SilverStripe\Comments\Forms;
 
+use SilverStripe\Comments\Controllers\CommentingController;
+use SilverStripe\Comments\Model\Comment;
+use SilverStripe\Control\Controller;
 use SilverStripe\Control\HTTPResponse;
+use SilverStripe\Core\Convert;
 use SilverStripe\Forms\CompositeField;
 use SilverStripe\Forms\EmailField;
 use SilverStripe\Forms\FieldList;
@@ -13,14 +17,7 @@ use SilverStripe\Forms\ReadonlyField;
 use SilverStripe\Forms\RequiredFields;
 use SilverStripe\Forms\TextareaField;
 use SilverStripe\Forms\TextField;
-use SilverStripe\Security\Member;
-use SilverStripe\Control\Cookie;
-use SilverStripe\Core\Convert;
 use SilverStripe\Security\Security;
-use SilverStripe\Comments\Model\Comment;
-use SilverStripe\Control\Controller;
-use SilverStripe\Comments\Controllers\CommentingController;
-use SilverStripe\Core\Config\Config;
 
 class CommentForm extends Form
 {
@@ -46,18 +43,27 @@ class CommentForm extends Form
                 // Email
                 EmailField::create(
                     'Email',
-                    _t('SilverStripe\\Comments\\Controllers\\CommentingController.EMAILADDRESS', 'Your email address (will not be published)')
+                    _t(
+                        'SilverStripe\\Comments\\Controllers\\CommentingController.EMAILADDRESS',
+                        'Your email address (will not be published)'
+                    )
                 )
                     ->setCustomValidationMessage($emailRequired)
                     ->setAttribute('data-msg-required', $emailRequired)
                     ->setAttribute('data-msg-email', $emailInvalid)
                     ->setAttribute('data-rule-email', true),
                 // Url
-                TextField::create('URL', _t('SilverStripe\\Comments\\Controllers\\CommentingController.WEBSITEURL', 'Your website URL'))
+                TextField::create('URL', _t(
+                    'SilverStripe\\Comments\\Controllers\\CommentingController.WEBSITEURL',
+                    'Your website URL'
+                ))
                     ->setAttribute('data-msg-url', $urlInvalid)
                     ->setAttribute('data-rule-url', true),
                 // Comment
-                TextareaField::create('Comment', _t('SilverStripe\\Comments\\Controllers\\CommentingController.COMMENTS', 'Comments'))
+                TextareaField::create('Comment', _t(
+                    'SilverStripe\\Comments\\Controllers\\CommentingController.COMMENTS',
+                    'Comments'
+                ))
                     ->setCustomValidationMessage($commentRequired)
                     ->setAttribute('data-msg-required', $commentRequired)
             ),
@@ -92,7 +98,7 @@ class CommentForm extends Form
             );
         }
 
-        $required = new RequiredFields(
+        $required = RequiredFields::create(
             $controller->config()->required_fields
         );
 
@@ -102,51 +108,59 @@ class CommentForm extends Form
         // if the record exists load the extra required data
         if ($record = $controller->getOwnerRecord()) {
             // Load member data
-            $member = Member::currentUser();
+            $member = Security::getCurrentUser();
             if (($record->CommentsRequireLogin || $record->PostingRequiredPermission) && $member) {
                 $fields = $this->Fields();
 
                 $fields->removeByName('Name');
                 $fields->removeByName('Email');
                 $fields->insertBefore(
-                    new ReadonlyField(
+                    ReadonlyField::create(
                         'NameView',
                         _t('CommentInterface.YOURNAME', 'Your name'),
                         $member->getName()
                     ),
                     'URL'
                 );
-                $fields->push(new HiddenField('Name', '', $member->getName()));
-                $fields->push(new HiddenField('Email', '', $member->Email));
+                $fields->push(HiddenField::create('Name', '', $member->getName()));
+                $fields->push(HiddenField::create('Email', '', $member->Email));
             }
 
             // we do not want to read a new URL when the form has already been submitted
             // which in here, it hasn't been.
-            $this->loadDataFrom(array(
+            $this->loadDataFrom([
                 'ParentID'        => $record->ID,
                 'ReturnURL'       => $controller->getRequest()->getURL(),
                 'ParentClassName' => $controller->getParentClass()
-            ));
+            ]);
         }
 
         // Set it so the user gets redirected back down to the form upon form fail
         $this->setRedirectToFormOnValidationError(true);
 
-        // load any data from the cookies
-        if ($data = Cookie::get('CommentsForm_UserData')) {
-            $data = Convert::json2array($data);
+        // load any data from the session
+        $data = $this->getSessionData();
+        if (!is_array($data)) {
+            return;
+        }
 
-            $this->loadDataFrom(array(
-                'Name'  => isset($data['Name']) ? $data['Name'] : '',
-                'URL'   => isset($data['URL']) ? $data['URL'] : '',
-                'Email' => isset($data['Email']) ? $data['Email'] : ''
-            ));
+        // load user data from previous form request back into form.
+        if (array_key_exists('UserData', $data)) {
+            $formData = Convert::json2array($data['UserData']);
 
-            // allow previous value to fill if comment not stored in cookie (i.e. validation error)
-            $prevComment = Cookie::get('CommentsForm_Comment');
+            $this->loadDataFrom([
+                'Name' => isset($formData['Name']) ? $formData['Name'] : '',
+                'URL' => isset($formData['URL']) ? $formData['URL'] : '',
+                'Email' => isset($formData['Email']) ? $formData['Email'] : ''
+            ]);
+        }
+
+        // allow previous value to fill if comment
+        if (array_key_exists('Comment', $data)) {
+            $prevComment = $data['Comment'];
 
             if ($prevComment && $prevComment != '') {
-                $this->loadDataFrom(array('Comment' => $prevComment));
+                $this->loadDataFrom(['Comment' => $prevComment]);
             }
         }
     }
@@ -184,8 +198,10 @@ class CommentForm extends Form
         }
 
         // cache users data
-        Cookie::set('CommentsForm_UserData', Convert::raw2json($data));
-        Cookie::set('CommentsForm_Comment', $data['Comment']);
+        $form->setSessionData([
+            'UserData' => Convert::raw2json($data),
+            'Comment' =>  $data['Comment']
+        ]);
 
         // extend hook to allow extensions. Also see onAfterPostComment
         $this->controller->extend('onBeforePostComment', $form);
@@ -203,7 +219,7 @@ class CommentForm extends Form
         }
 
         if ($member = Security::getCurrentUser()) {
-            $form->Fields()->push(new HiddenField('AuthorID', 'Author ID', $member->ID));
+            $form->Fields()->push(HiddenField::create('AuthorID', 'Author ID', $member->ID));
         }
 
         // What kind of moderation is required?
@@ -246,8 +262,16 @@ class CommentForm extends Form
             $this->getRequest()->getSession()->set('CommentsModerated', 1);
         }
 
-        // clear the users comment since it passed validation
-        Cookie::set('CommentsForm_Comment', false);
+        // clear the users comment since the comment was successful.
+        if ($comment->exists()) {
+            // Remove the comment data as it's been saved already.
+            unset($data['Comment']);
+        }
+
+        // cache users data (name, email, etc to prepopulate on other forms).
+        $form->setSessionData([
+            'UserData' => Convert::raw2json($data),
+        ]);
 
         // Find parent link
         if (!empty($data['ReturnURL'])) {